JP2009153735A - Packaging body of absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging body of an absorbent article, which does not easily form sharp folding on the absorbent article and is capable of obtaining excellent fitness and leakage preventing effect while the absorbent article is worn. <P>SOLUTION: This invention relates to the packaging body 10 of the absorbent article, wherein the practically vertically long absorbent article 1 provided with a skin abutting surface, a skin non-abutting surface and an absorbent 4 interposed between both surfaces is folded in the longitudinal direction and packaged by a packaging material. The absorbent 4 has bend areas B41 and B42 where a plurality of bend assisting means S1-S3 which extend in the width direction of the absorbent 4 and have a length shorter than the entire width of the absorbent are formed shifting positions in the longitudinal direction of the absorbent, and the absorbent article 1 is bent at parts where the bend areas B41 and B42 exist. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an individual package of an absorbent article in which an absorbent article such as a sanitary napkin, a panty liner (corimono sheet), or an incontinence pad is folded in the longitudinal direction and wrapped with a packaging material.

For the purpose of keeping sanitary napkins and panty liners to be easy to carry and hygienic, the surface that normally comes into contact with the skin when worn (skin contact surface) should be on the inside. These are individually packaged in a state bent in the longitudinal direction and are commercially available.
Patent Document 1 describes a sanitary napkin in which an absorbent body is composed of a plurality of independent segments arranged in series in the longitudinal direction.

JP-T 6-503249

Since the sanitary napkin etc. in the individual package is in a folded state, when the sanitary napkin etc. is taken out and used, there are many cases where the folding gusset remains strongly, and the folding gusset remaining in the absorber The wrinkles generated on the skin contact surface may cause the wearer to feel uncomfortable or to prevent leakage.
When the sanitary napkin of Patent Document 1 is folded in the longitudinal direction, the sanitary napkin can be bent at the site between the independent segments. In that case, the napkin is bent at one site between the independent segments, so that the napkin is expanded. When used, the wrinkles generated on the skin contact surface may reduce the fit and leakage prevention, or the end of the independent segment may hit the wearer and give a sense of discomfort.

  Accordingly, an object of the present invention is to provide an individual package of an absorbent article that is less likely to be tightly folded and has excellent fit and leakage prevention effects while the absorbent article is being worn. It is in.

  In the present invention, a substantially vertically long absorbent article comprising a skin contact surface, a non-skin contact surface and an absorbent body interposed between both surfaces is folded in the longitudinal direction and packaged with a packaging material. An absorbent article individual package, wherein the absorbent body extends in the width direction of the absorbent body and has a length that does not extend over the entire width of the absorbent body. By providing an individual package of an absorbent article, which has a folded region formed by shifting a plurality of positions in the longitudinal direction, and the absorbent article is folded at a site where the folded region exists. The object has been achieved.

  According to the individual packaging of the absorbent article of the present invention, the absorbent article is difficult to be tightly folded, and an excellent fit and leakage prevention effect can be obtained while the absorbent article is worn.

As shown in FIG. 5 (b), the individual package of the absorbent article according to the embodiment of the present invention is a single package 10 of the sanitary napkin 1. FIG. 1 shows a state in which the individual package 10 shown in FIG.
The sanitary napkin 1 (hereinafter, also simply referred to as napkin 1) in the individual package 10 of the present embodiment is a liquid-permeable top sheet 2 that forms a skin contact surface, as shown in FIGS. A liquid impervious (concept including imperviousness) back surface sheet 3 that forms a skin contact surface, and an absorbent body 4 interposed between the two sheets 2 and 3 are provided. The napkin 1 has a substantially vertically long shape. The longitudinal directions of the napkin 1 and the absorbent body 4 are both directions that coincide with the wearer's front-rear direction when the napkin 1 is worn.

  The absorbent body 4 and the top sheet 2 and the back sheet 3 that cover both sides thereof are laminated as shown in FIGS. 1 and 2, and the main body extends over the longitudinal direction of the napkin 1 at the center in the width direction of the napkin 1. Part 1A is formed. The top sheet 2 and the back sheet 3 extend outward from the periphery of the absorbent body 4, and are joined to each other by a known joining means (such as an adhesive or heat seal) at the periphery 11 of the napkin 1. An adhesive portion 12 for fixing the napkin 1 to underwear such as shorts is provided on the surface (non-skin contact surface) on the back sheet 3 side of the napkin 1.

  As shown in FIGS. 2 and 3, the absorbent body 4 of the napkin 1 includes two sheet-shaped absorbent bodies 41 and 42 having substantially the same shape and stacked. “Lamination” in the present invention includes both cases where the layers are joined and cases where the layers are not joined.

And two bending area | regions B41 and B41 (B42, B42) are formed in each of the two sheet-like absorbers 41 and 42, as shown in FIG.1 and FIG.3.
The two folded regions B41 and B41 of one sheet-like absorbent body 41 sandwich the excretion point portion P (see FIG. 1) where the wearer's liquid excretion portion is arranged opposite to each other when the napkin 1 is worn, One folding region B42, B42 of the other sheet-like absorbent body 42 is also formed on the front and back sides of the excretion point portion P in the same manner.

Each of the two bent regions B41 and B41 of the sheet-like absorbent body 41 extends in the width direction (Y direction) of the absorbent body 4 and extends over the entire width of the absorbent body 4 as shown in FIG. Three slits (folding assisting means) S <b> 1 to S <b> 3 having different lengths are formed by shifting the positions in the longitudinal direction (X direction) of the absorber 4.
In each of the two bent regions B42 and B42 of the sheet-like absorbent body 42, slits (folded) extending in the width direction (Y direction) of the absorbent body 4 and having a length that does not extend over the entire width of the absorbent body 4. Auxiliary means) S4 to S7 are formed by shifting the position in the longitudinal direction (X direction) of the absorber 4.

If the bending region has a plurality of bending assisting means having different positions in the longitudinal direction (X direction) of the absorbent body, in addition to them, the position in the longitudinal direction (X direction) of the absorbent body 4 You may have the additional folding assistance means in the same position as any folding assistance means.
For example, the bending region B41 in the present embodiment has the three slits S11, S21, and S31 shown in FIG. 4 as three slits having different positions in the longitudinal direction (X direction) of the absorber. In addition to the slits S11, S21, S31, the two slits S12, S13 in the longitudinal direction (X direction) of the absorber 4 are the same as the slit S11, and the longitudinal direction (X direction) of the absorber 4 is a slit. The two slits S22 and S23 that are the same as S21 and the two slits S32 and S33 that are the same as the slit S31 in the longitudinal direction (X direction) of the absorber 4 are provided.

In each folding region, a plurality of slits (folding assisting means) formed by shifting the positions in the longitudinal direction (X direction) of the absorber are spaced in the same direction (distance between the center lines of the folding assisting means). It is preferable that L1 (refer FIG. 4) is 3-10 mm, More preferably, it is 4-6 mm.
Further, in each folding region, a plurality of slits (folding assisting means) formed by shifting the positions in the longitudinal direction (X direction) of the absorbent body have a dispersion width L2 or L2 ′ in the same direction (see FIG. 4). However, it is preferable that it is 6-20 mm, More preferably, it is 4-12 mm.
Further, in terms of the relationship with the thickness T (see FIG. 2) of the absorber, the interval (distance between the center lines of the bending assisting means) L1 (see FIG. 4) is relative to the thickness T of the absorber 4. 70 to 150%, particularly preferably 90 to 130%, and the dispersion widths L2 and L2 ′ (see FIG. 4) are 90 to 150% with respect to a value obtained by doubling the thickness T of the absorber 4. In particular, it is preferably 105 to 130%.

Further, the lengths L3, L4, and L5 (see FIG. 4) of each slit (folding assisting means) are provided when viewed from the surface side (in this embodiment, the surface sheet side) that is the outer surface side after bending. It is preferably 10 to 50% of the entire width W (see FIG. 4) of the bent region B41 in the formed portion, and preferably 20 to 40% from the viewpoint of the strength and liquid mobility of the absorber.
When there are slits (folding assisting means) having the same position in the longitudinal direction (X direction) of the absorbent body 4, the total length (L3 + L4 + L5) of those slits is that of the bending region B41 in the portion where those slits are provided. It is preferably 40 to 90% of the total width W (see FIG. 4), and preferably 50 to 80% from the same viewpoint.
In addition, the slit is preferably formed from 5 to 50% longer on the surface side that is the outer surface side after bending than the surface side that is the inner surface side from the viewpoint of easy folding and the like, From the same viewpoint, it is preferable to increase the length on the outer surface side as the absorber thickness increases.

  The two sheet-like absorbers 41 and 42 constituting the absorber 4 are overlapped so that the bending regions B41 and B42 overlap each other. In the example shown in FIG. 4, in the folded region B41 of one sheet-like absorbent body 41, more than half of the length in the longitudinal direction of the absorbent body 4 overlaps with the folded region B42 of the other sheet-shaped absorbent body 42. In the other sheet-like absorbent body 42, the entire length in the longitudinal direction of the absorbent body 4 overlaps the bent region B41 of the one sheet-like absorbent body 41.

The individual package 10 of the napkin 1 of this embodiment can be obtained as follows, for example.
First, as shown in FIG. 1, the napkin 1 is placed on a vertically long packaging material 5. And as shown to Fig.5 (a), the napkin 1 is bent to a longitudinal direction in the site | part in which one bending area | region B41 and B42 exist with the packaging material 5. FIG. Next, as shown in FIG. 5 (b), the napkin 1 is further folded in the longitudinal direction together with the packaging material 5 at the site where the other folding regions B 41 and B 42 exist.
Then, both side portions 51 of the packaging material 5 extending outward in the width direction from both side edges of the napkin 1 folded in this way are formed by a known method such as hot embossing as shown in FIG. The individual package 10 of the napkin 1 is obtained by sealing and fixing the tab tape 52 to a predetermined location.

  In the individual package 10 of the sanitary napkin 1 according to the present embodiment, the napkin 1 is folded in two at a distance from each other in the longitudinal direction, and is folded in a three-fold state. The napkin 1 is formed with two bent portions B1 and B2 that are bent in the longitudinal direction so that the skin contact surfaces directly face each other. “Skin contact surfaces directly face each other” means that there is no interspersed thickness between the skin contact surfaces, such as an absorbent body. When only the folded wings are interposed, It is included in the skin contact surfaces directly facing each other.

  In the individual package 10 of the napkin 1 according to the present embodiment, the napkin 1 is bent at the portions having the bent regions B41 and B42 in both of the bent portions B1 and B2. As shown in FIG. In the bent portions B1 and B2, the absorber 4 is bent at a relatively gentle angle at each of a plurality of positions (positions of the slits S1 to S6) dispersed in the longitudinal direction. Therefore, unlike the case where the absorbent body 4 is bent at a steep angle only at one place, the napkin 1 and the absorbent body 4 are not strongly folded, and the skin contact surface is not easily wrinkled.

  Therefore, when the napkin 1 is taken out from the individual package 10 and fixed to an underwear such as shorts and worn, the wearer feels uncomfortable due to the folds on the napkin 1 and the absorbent body 4 and wrinkles generated on the skin contact surface. Or leakage is prevented, and an excellent fit and leakage prevention effect can be obtained. The imaginary line CL in FIGS. 1 and 3 indicates the center line (see FIG. 6) of the bent portions B1 and B2.

  In addition, bending area | region B41 (B42) in which the slit was formed in the aspect mentioned above is bending part B1, the napkin 1 was bent in the longitudinal direction among the two sheet-like absorbers 41 and 42 which comprise an absorber. It is preferable to be formed in the sheet-like absorber 42 located at least outside in the folding direction in each of B2, and the sheet-like absorber 41 located inside in the folding direction and the sheet-like absorber 42 located outside in the folding direction. It is more preferable that they are formed on both.

  In the individual package 10 of the present embodiment, the sheet-like absorbent body 41 located on the inner side in the folding direction and the sheet-like absorbent body 42 located on the outer side in each of the bent portions B1, B2 where the napkin 1 is folded in the longitudinal direction. Bending regions B41 and B42 are formed in both. Moreover, as shown in FIG. 6, in each bending part B1, B2, the position of slits S1-S3 of one sheet-like absorber 41 and the position of slits S4-S7 of the other sheet-like absorber 41 overlap. Absent. Therefore, it is possible to prevent the absorbent body 4 from being bent only at one place, and the wearer may feel uncomfortable due to strong creases on the napkin 1 or the absorbent body 4 or wrinkles generated on the skin contact surface, and leakage prevention property may be provided. It can prevent more effectively that it falls.

In the napkin 1, the top sheet 2 and the absorber 4 are not joined at the bent portions B1 and B2, and the bent portions B1 and B2 are also connected between the top sheet 2 and the absorber 4. Are not joined. Specifically, the surface of the absorbent body 4 on the surface sheet 2 side is joined to the surface sheet 2 only at the application site of the adhesive 47 shown in FIG. B41 and B41 are not joined to the top sheet 2. Further, the surface on the back sheet 3 side of the absorbent body 4 is joined to the back sheet 3 only at the application site of the adhesive 48 shown in FIG. 3B, and the folded regions B 42 and B 42 of the sheet-shaped absorbent body 42. Is not bonded to the back sheet 3.
By joining the top sheet 2 and the absorbent body 4 and / or the absorbent body 4 and the back sheet 3 in such a manner, the absorbent body 4 can be prevented from being bent at one place, and the napkin It is possible to more effectively prevent the wearer from feeling uncomfortable or reducing the leakage prevention property due to the strong creases attached to 1 and the absorbent body 4 and wrinkles generated on the skin contact surface.

  Further, from the same viewpoint, it is preferable that the two sheet-like absorbers 41 and 42 are not joined at the bent portions B1 and B2, and the napkin provided on the non-skin contact surface of the napkin 1 It is preferable that the adhesive part 12 for fixing 1 to the underwear also does not exist in the bent parts B1 and B2.

  Adhesive for bonding between the top sheet 2 and the absorbent body 4, between the absorbent body 4 and the back sheet 3, and between the two sheet-like absorbent bodies 41 and 42 constituting the absorbent body 4. Each coating method may be solid coating with a slot coater or the like, but pattern coating is preferred. Preferable examples of the pattern coating application include spiral patterns, dot patterns, stripe patterns (striped patterns), lattice patterns, checkered patterns, and the like.

  In the present embodiment, an absorbent sheet containing a fiber material and a water-absorbing polymer is used as the two sheet-like absorbent bodies 41 and 42 constituting the absorbent body 4. The absorbent sheet is formed by bonding the water-absorbing polymer to the constituent fibers through the adhesive force generated in the water-absorbing polymer in the wet state or a separately added adhesive or adhesive fiber. This is preferable from the viewpoint of little dropping of polymer.

  As the absorbent sheet, for example, an absorbent sheet manufactured by the method described in JP-A-8-246395, pulverized pulp supplied in an air stream and a water-absorbing polymer are deposited, and then an adhesive (for example, acetic acid) is used. Dry sheets hardened with vinyl adhesives, PVA, etc.) Absorbent sheets obtained by spraying a superabsorbent polymer after applying hot melt adhesive between paper and nonwoven fabric, spunbond or meltblown nonwoven fabric An absorbent sheet or the like obtained by blending a superabsorbent polymer during the production process can be used. These absorptive sheets can be used as a sheet-like absorber by cutting one sheet into a predetermined shape. In addition, a plurality of absorbent sheets are bonded together to form a multilayer sheet, or a single absorbent sheet is folded and the layers are bonded to form a multilayer sheet, and the multilayer sheet thus obtained is absorbed into a sheet. It can also be used as a body.

  In order to form slits in the sheet-like absorbent bodies 41 and 42, the sheet-like absorbent bodies 41 and 42 may be cut by a known cutting means. However, when a sheet-like absorbent body containing a water-absorbing polymer is used, From the viewpoint of preventing the leakage of the conductive polymer, a heat-fusible material such as a thermoplastic fiber or a hot melt adhesive is included in the sheet-like absorber, and heat fusion is performed at the same time as cutting or before and after cutting. It is also preferable to melt the water-soluble material and seal the cut surface with the melted heat-fusible material so that the water-absorbing polymer does not leak out.

In addition, it is preferable that the absorber 4 has a thickness T of 0.5 to 6 mm, particularly 1 to 5 mm, and a basis weight of 30 to 500 g / m ² , particularly 50 to 250 g / m ² is preferably used. . The individual sheet-like absorbers 41 and 42 constituting the absorber 4 preferably have a thickness of 0.5 to 4 mm, particularly 1 to 3 mm, and a basis weight of 20 to 150 g / m ² , particularly 40 to 40 mm. It is preferable to use 80 g / m ² .

The thickness of the absorber 4 and the sheet-like absorbers 41 and 42 is measured as follows.
For measuring the thickness, a KES-G5 system (manufactured by Kato Tech) is used. The KES-G5 system is composed of a measurement program and a measurement main body. The conditions of the measurement program are: sample: cloth / film, SENS: 2, force meter type: 1 kg, SPEED RANGE: 0.1-2 cm / sec (0.2 mm / sec), DEF sensitivity: 5 mm /, pressure area 2 cm ² , measurement load: 5.0 (upper limit load 50 gf / cm ² ), measurement is performed once. It is preferable that the measurement sample has a rectangular shape in a range of 30 mm to 100 mm. The measurement is performed five times on different samples (different locations for sufficiently large samples), and T0 is obtained for each measurement. To do.

As the material for forming the top sheet 2, the back sheet 3, and the packaging material 5, various known materials that are conventionally used for individual packaging of absorbent articles such as sanitary napkins can be used without particular limitation.
For example, as the surface sheet 2, a sheet made of a nonwoven fabric such as an air-through nonwoven fabric, a heat embossed nonwoven fabric, or a spunbond nonwoven fabric, a sheet subjected to a pore opening treatment, a pored film, or the like can be preferably used. As the back sheet 3, a resin film, a laminate material of a resin film and a nonwoven fabric, paper, or the like is preferably used. A breathable sheet can also be used as the back sheet 3. As the packaging material 5, a nonwoven fabric, a resin film, paper, a laminated body of these, or the like can be used.

  As the back sheet 3, it is also preferable to use a sheet having elasticity in the same direction as the longitudinal direction of the napkin 1. Examples of a preferable stretchable sheet that can be used as the back sheet 3 include a film obtained from a polyolefin resin obtained using a urethane or metallocene catalyst, and a polyester-based elastic film.

As mentioned above, although one Embodiment of this invention was described, this invention is not restrict | limited to embodiment mentioned above, A various change is possible.
For example, the slits formed in the bending regions B41 and B42 of the two sheet-like absorbers 41 and 42 are not limited to the above-described arrangement and can be arranged in various forms. For example, the slits S1 to S3 are formed in the sheet-like absorbent body 41 on the top sheet 2 side, and the slits S4 to S7 are formed in the sheet-like absorbent body 42 on the back sheet 3 side in a manner as shown in FIG. It may be formed. Moreover, you may provide only one slit in the same position of the longitudinal direction of the absorber 4 like the slit S2 of FIG.7 (b). Further, as the slits S40 to S42 shown in FIG. 7C are separated from the center line CL of the bent portion, the slit interval and the slit length can be gradually increased.

Further, only the slits S11, S22, and S33 among the slits of the sheet-like absorber 41 shown in FIG. 4 are formed in the sheet-like absorber 41, only S12, S22, and S32 are formed, and S11, S13, Only S22, S31 and S33 may be formed.
Further, the slit is not limited to the one that is completely parallel to the width direction of the absorber 4, but has a certain angle with respect to the width direction of the absorber 4 (for example, an angle of 15 degrees or less), or a gentle arc shape. It may be what constitutes.

Further, the absorbent body 4 may be composed of a single sheet-shaped absorbent body instead of the composed of the two sheet-shaped absorbent bodies 41 and 42. Further, as the absorbent body 4, an aggregate of hydrophilic fibers such as pulp fibers or an absorbent core having a water-absorbing polymer held thereon is coated with a highly liquid-permeable covering sheet made of tissue paper or nonwoven fabric. Or the like can be used. Further, only one of the two sheet-like absorbers 41 and 42, for example, only the sheet-like absorber 42 positioned outside the folding direction of the bent portion may have a bending region having the above-described configuration. good.
When the absorbent article such as the napkin 1 has a plurality of bent portions that are bent in the longitudinal direction and the skin contact surfaces directly face each other, the bent regions having the above-described configuration exist in all the bent portions. Although it is preferable, a bent region having the above-described configuration may exist only in one or a part of the bent portions.

Further, the individual package may be one in which the absorbent article is bent at one place or three or more places in the longitudinal direction. Further, as a bending assisting means, instead of slits, grooves by embossing, a large number of through holes arranged in a line, etc. can be formed, and slits, embossing, and through holes can be used in combination. In this case, as in the case of the slit, it is preferable that the surface corresponding to the outer surface after bending is formed to have a longer equivalent circle diameter of 5 to 50% than the surface corresponding to the inner surface. The equivalent circle diameter is a method of converting the diameter of various shapes into a circle diameter based on the area. In the case of embossing, the area of the bottom is compared with the area of the top of the outer surface. And the upper diameter is compared.
In addition to the sanitary napkin, the absorbent article in the present invention may be a panty liner (orimono sheet), an incontinence pad, or the like.

  In addition, the description omitted in one embodiment and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately applied between the embodiments. Can be substituted for each other.

FIG. 1 is a partially cutaway plan view showing an individual package of a sanitary napkin according to an embodiment of the present invention in a state in which the sanitary napkin and a packaging material are expanded in a planar shape. It is the II-II line schematic cross section of FIG. It is a figure which isolate | separates and shows the absorber of the sanitary napkin shown in FIG. 1 to the two sheet-like absorbers which comprise this absorber, (a) is a surface among two sheet-like absorbers FIG. 3B is a plan view showing a surface on the back sheet side of the sheet-shaped absorber positioned on the back sheet side. FIG. 3B shows a surface on the top sheet side of the sheet-shaped absorber positioned on the sheet side. It is a top view which expands and shows a part of absorber of the sanitary napkin shown in FIG. FIG. 5 is a schematic view showing a manufacturing process of the individual package of FIG. 1, and FIG. 5 (a) is a state in which a sanitary napkin is placed on a packaging material and bent at one place, FIG. 5 (b). These are figures which show the state (individual package) which sealed the packaging material extended from the side edge part of a sanitary napkin after further bending. It is a schematic diagram which shows the cross section of the absorber which follows the III-III line | wire of FIG. It is a top view which shows the formation aspect of the slit in other embodiment of this invention.

Explanation of symbols

1 Sanitary napkin (absorbent article)
2 Top sheet 3 Back sheet 4 Absorber 41 Sheet-like absorber B41, B41 Folding regions S1 to S3, S11 to 13, S21 to S23, S31 to S33 of the sheet-like absorber Slit (folding assisting means)
42 Sheet-like absorbers B42 and B42 Sheet-form absorber folding regions S4 to S7 Slit (folding assisting means)
5 Packaging Materials B1, B2 Napkin Bending Part 10 Individual Package of Sanitary Napkin (Individual Package of Absorbent Article)

Claims (5)

A substantially vertically long absorbent article comprising a skin contact surface, a non-skin contact surface and an absorbent body interposed between both surfaces is folded in the longitudinal direction and packaged with a packaging material. An individual body,
The absorbent body is formed with a plurality of bending assisting means extending in the width direction of the absorbent body and having a length that does not extend over the entire width of the absorbent body while shifting the position in the longitudinal direction of the absorbent body. Have a folded area,
An individual package of an absorbent article, wherein the absorbent article is bent at a site where the folding region exists.   The absorbent article has one or a plurality of bent portions that are bent in the longitudinal direction so that the skin contact surfaces directly face each other, and the bent region is located in all the bent portions. The individual package of the absorbent article according to claim 1.   The said absorber has two sheet-like absorbers laminated | stacked, The said bending area | region is formed in the sheet-like absorber located in the outer side of the bending direction of the said absorbent article. The individual package of the absorbent article according to 2.   The absorbent body has two laminated sheet-like absorbent bodies, each of the two sheet-like absorbent bodies has the bent region formed therein, one sheet-like absorbent body and the other sheet-like absorbent body. The individual package of the absorbent article according to any one of claims 1 to 3, wherein the bending assisting means is not overlapped with the absorbent body.   The individual package of the absorbent article in any one of Claims 1-4 whose said bending assistance means is a slit.

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